Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number MKF 4490 found under Bushing Machine Thread by Elster Amco Water Llc. The National Stock Number assigned to this part is 5365014565645, and the Federal Supply Class is 5365 Bushings Rings Shims And Spacers. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like MKF 4490.